Originally Posted by
contango
or saving 150g by taking a chainring off and forever having to remember which settings you can't use any more so the chain doesn't fall off,
Not that I'm advocating the OP's modification, but you wouldn't have to remember not to shift into where the big ring was. You just adjust the limit screws.
Or he could simply make it a 1x10 by remiving all but the middle ring, and installing a chain catcher.